Injector



(Model.)

' H. B. MUR-DOCK.

INJBGTOR.

Patented July 1 7, 1883'.

A No. 281,389.

Vigie/y;

UNITED l STATES..A

PATENT OFFICE.

HORACEB. MUEDocK, or DETROIT, MICHIGAN.

INJECTO R.

SPECIFICATION forming part of Letters Patent No. 281,389, dated July 1'7, 1883.

Application filed April 3, 1883.

To all whom it may concern:

Be it known that I, HORACE B. MURDocK, of Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Injectors, and I do hereby the purpose of feeding steam-generators; and

the invention consists, primarily, inthe construction and arrangement of the different parts, whereby the operation of starting may be mechanically performed bythe device itself, and, secondarily, in constructive features, Which give the device great simplicity combined with perfect adjustment, and extra facility for manufacturing, all as more fully hereinafter described.

The injector herein described is unprovided with a lifting device, as it is intended to be operated by the exhaust-steam from the engine, and the water is taken, with its ordinary pressure, from city mains, or from a tank which gives it a corresponding pressure.

Figurel is avertical central section of my Fig. 2 is a detached perspective ofr injector. the valve-disk of the spring-valve below the discharge-nozzle. Fig. 3 is a cross-section on lineXKin Fig. l. Fig. 4 is a vertical central section of a modified form of combining-tube,

In the accompanying drawings, which form a part of this specification, A is the inlet-pipe for the exhaust-steam. It connects the device' with the exhaust-pipe l of the engine in any convenient manner. Y

B is the water-supply pipe, which connects the device with thevwater-mains, or with an elevated water-tank. It is provided at a convenient point with theusual globe-valve, so as to allow the water to be turned on or off.

C is the feed-pipe connecting the device in the usual mannerwith the steam-generator, and

it is also provided with the usual check-valve,w.

D is the overiiow, allowing the water not forced into the steam-generator to escape.

E is a steam-nozzle to contract the inflow- (Model.)

ing exhaust-steam into a lpowerful steam-jet. It is seated by means of an annular flange, a, as shown.

.F is the combining-tube, immediately below and in axial line with thel steam-j et. It is seated, by means of an annular iiange, e, on top of the combining-tube G, which is, in the main, a continuation of the combining-tube F, but is made in a separate piece, andis seated within the walls s of the device by means of its annular fiangef.

Between the combining-'tubes F and G is an annular space, h, which communicates with the chamber O through the passages i in the combining-tube G.

Between the discharge end b of the steamnozzle E and the inlet c of the combining-tube F is an annular space, k, which forms the water-inlet, and its area is made greater than that of the discharge-openingl of the combining-tube G for the purposes hereinafter described. 1 Y

H is a perforated metal cylinder, lined on the inside with a fine-meshed wire-cloth, I. It extends between the fianges a and e of the tubes E F and forms the means for holding the tubes F and G in position.

K is the chamber surrounding the tubes E and F, between the flanges a and e, and connects, through the inlet L, with the water-supply pipe B. 'Ihe screen I forms a partition in this chamber, and all water which passes in through the inlet L into the annular space 7c has to pass through the screen partition.

M is a port leading from the chamberK into the passage N, connecting it with the chamber O, which latter surrounds the lower end of the combining-tube G.

P is a faucetvalve for closing or disclosing the port M. The axis'of the faucet-valve I), port M, and inlet L coincide and pass through the plane of the annular space k, which latter lies central within the chamber K. The chamber O communicates with thewatenchamber K through the combining-tubes, and likewise by means of the passage N and port M. The ports fi connect'it with the annular space h between the combining-tubes, and the port R connects it with the overflow D. The port R is controlled by the spring-valve S, which opens outwardly, and has a screw-plug, my, by which the tension of its spring can be regulated.

T is the discharge-tube, in the same axial line with the tubes E, F, and G, and commu-- nieates, through the passage U and outlet V, with the feed-pipe C.

W is a spring-valve which controls the port X in the passage U and opens inwardly.

Y is a tube forming the valve-case and valve-seat for the spring-valve XV, and also forming a passage between the port X and the ports Z, which latter communicate with the overflow-pipe D.

n is a screw-plug to adjust the tension of the spring of the valve XV. The axis of the tubes E, F, and G coincides with the axis of the discharge-nozzle T, port X, and spring-valve W. The axis of the spring-valve S coincides with the axis of the outlet V. j

In practice, with the device connected as indicated above, the exhaust-steam from the engine will pass into the device through the pipe A, and, after being converted into a jet by the nozzle E, will find an easy passage through the open spring-valve W into the overow-pipe D, and thence out. Now, if the water-supply is turned 011, the chamber K will fill and water will pass through the annular space into the combining-tubes, and part of it will pass out through the discharge-opening l into the discharge tube T and find itsway through the open spring-valve into the overiow; but as the annular space 7c admits more water than the discharge-opening l can carry off, the surplus will have to pass through the annular space h and ports i into the chamber O, which is soon iilled. Now, with the springvalve S so adjusted that it opens as soon as the water in the chamber O has pressure, the water filling the chamber O will force the springvalve S open and allow it to escape into the overflow-pipe D. This action of the valve S, in connection with the ports z' and annular space or overflow h., is necessary to prevent the water from rising into the nozzle E and defeating the proper action of the steam-jet, which now is free to act upon the water flowing through the combining-tube, which soon acquires the necessary velocity to overcome the boiler-pressure. Now, the valve WV is so adjusted that it will keep open and allow the water to pass through it into the overflow until its velocity and consequent pressure exceeds the boilerpressure, and, raising the check-vave w from its seat, flows into the boiler. It is clear that as long as the water is forced out through the port X there is a pressure on both sides of the valve-disk of the valve XV; but as soon as the water finds its way into the generator the pressure upon the under side of the valve-disk is relieved and the valve will be seated forcibly under the action of the stream from the dischargenozzle upon the upper side of the valve. It is clear that after the action of the steam-jet upon the water passing through the combining-tube is well established no more water will pass through the annular space h and ports z' into the chamber O, and a vacuum will soon form therein, as all the air o1' water will be drawn in at p and the valve S will be forcibly closed upon its seat. As will be seen, this whole action of starting has been performed mechanically by the device itself, and no other attention was required beyond the turning on of the water. To adjust the injector' so that it will work to its utmost capacity, the valve P comes now into play, and by opening it water will be admitted through the port M and passage N into the chamber O, and, if the supply of it is in proper relation to the force of the stream passing from the combining-tubeinto the discharge-tube T, it will be drawn in at p and carriedto the steam-generator. If more water is admitted than the steam can take care of, it will destroy the vacuuln in the chamber O by filling it up, and after forcing the valve S open will find an exit into the overow. This appearance of water at the overow indicates that the supply of water through the port M has to be reduced. Whenever during the operation cold water appears at the overllow, itindicates that it comes through the port It, while the appearance of warm or hot water at the overiiow shows that the valve "W is open. This may, while the valve is in operation, be easily made use of to procure a quantity of hot or cold water at the overflow at the will of the operator.

It will be seen that the axial position of the faucet-valve P and inlet L, valve S and discharge V, and valve XV and steam-inlet A affords peculiar facility in manufacturing the device, as the different valve-seats and other interior parts which have to be finished can be easily centered upon thelathc. In seating the steam-nozzle and combining-tubes in the manner described I gain great facility for removing these parts for the sake of examination or repair.

In Fig. 4 I show the combining-tubesF and G combined into 011e single tube, leaving the rest ofthe device unchanged. \Vith this modification the operator has to start the device himself by turning on the water-supply, but gradually taking care to prevent the appearance of cold water at the overiiow, which indicates that he is admitting too much water into the device. After the device is started he may open the supply-valve to its full capacity, as all the water admitted at k will then be taken care of by the steam-jet. The arrangement of the wire-cloth so as to form the largest possible area, and placing it concentrically around the annular ring, thereby screening all the water which passes through the device without interrupting its free flow to any extent, is also a desirable improvement.

It is clear that under certain circumstances it may be desirable to have a branch pipe from IOO IIO

the exhaust-steam-supply pipe A to the gen-4 erator, so as to work the injector withv live steam from the generator when a contingency may arise.

What I claim as my invention is- 1. In an injector, the combination, with an auxiliary overflow-port,.of an auxiliary. overflow-valve opening outward under the pressure of such supply-water in the injector which is not owing through the discharge-tube, substantially as and for the purposes set forth.

2. In an injector, and in combination with forming a communication with said port and.

the inlet-opening ofthe discharge-tube, substantially as and for the purpose described.

4. In an injector, the combination of an auxiliary water-supply port controlled by a faucetvalve, a passage forming a communication with said port and the inlet-opening of the discharge-tube, and an auxiliary overflow-port controlled by a valve which opens outwardly under the pressure of said water in the injector which is not ilowing through the dischargetube, substantially as and for the purpose specified.

5. In an injector, the combination of two overflow ports mechanically controlled by valves, one of which opens with the pressure of such water in the injector which cannot pass through the discharge tube, and the other and in combination with the jet-tube, the overflow, and the valve WV, the combining-tubes F and G, and the valve S, as set forth.

8. In combination with the jet-tube E and overflow leading from the chamber -O, the tubes F and G, arranged to form an annular space, h, and the channels c', connecting the said chamber O and space h, as set forth.

9. In an injector substantially as described, and in combination with the water-connection B and steam-connection A, the perforated cylinder K, the jet-tube E, having flange a, the combining-tubes F and G, having ilanges e and f, respectively, and the body-castings, as set forth.

10. In combination with the casting having inlets A and B, the perforated cylinder K, forming the chambers L M, the channels N, connecting with the overiiow-chamber O, the screen I, and valves, as set forth.

11. In an injector substantiallyasdescribed, the combination, with the check-valve lw and inwardly-opening valve XV, of the spring for holding such valve W open until the pressure has overcome the pressure against the valve w, and means n for adjusting the force of said spring, as set forth.

' HORACE B. -MURDOGK- Vitnesses:

H. S. SPRAGUE,

E. SoULLY. 

